The hacker group Anonymous targeted city computers in Methuen in retaliation for the recent arrest of a high school student accused of making terror threats online.

Mayor Stephen Zanni said the hackers targeted the city because they were upset about the arrest of Cameron Dambrosio, 18, according to the Eagle Tribune. The teen allegedly threatened to outdo the Boston Marathon bombings.

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Anonymous has previously taken credit for cyber-attacks on the FBI and other government agencies, including the Boston Police Department.

Zanni said the issue in Methuen was dealt with over the weekend, the newspaper reported.

Dambrosio was charged last week with communicating a terrorist threat.